Electric ignition apparatus.



E. S. HUFF.

ELECTRIC IGNITION APPARATUS.

APPLICATION FILED NOV. 20. 1916.

1,236,94L Patented Aug. 11,1911.

UNITED s'rAns Arena EDWARD S. HUFF, 0F DETROIT, MICHIGAN, ASSIGNOR TOHUFF LABORATORIES, INC., 0F DETROIT, MICHIGAN, A CORPORATION OFMICHIGAN.

ELECTRIC IGNITION APPARATUS.

Specification of Letters Patent.

Patented Aug. 14, 31917.

To all whom it may concern:

Be it known that I, EDWARD S. HUFF a citizen of the United States,residing at etroit, county of Wayne, State of Michigan, have invented acertain new and useful Improvement in Electric Ignition Apparatus, anddeclare the following to be a full, clear, and exact description or thesame, such as will enable others sln'lled in the art to which itpertains to make and use the same, reference being had to theaccompanying drawings, which form a part of this specification.

My invention relates to electric ignition apparatus for internalcombustion engines and an object of my improvements is to provide animproved apparatus and one in which the material will not accumulateupon one of the contact points of the make-andbreak apparatus.

I secure this object in the device illustrated in the accompanyingdrawings in which;

Figure 1 is a diagrammatic view of an electric apparatus embodying myinvention.

Fig. 2 is a similar view of a modified form of the same.

a is a timer having the contact plates a and a and revolving contact arm2'. This latter is geared to the engine so that the contacts at theplates of and a shall be made at the proper time. This connection isconventional and well understood and therefore is not indicated in thedrawings. The arm 2' is grounded at g.

h is one group ofbattery cells and k is another and an equal group. Thetwo groups 72. and k are connected in series as shown.

The contact plate a is connected by a conduct-or d to the positive poleof the group 72. and the plate a is connected by a conductor e to thenegative pole of the group h. 7 is a third wire or conductor connectedbetween the groups of cells it and 71.

In the conductor f is a make-and-break device which may be a vibrator bwhich is grounded at 9 c is a coil having the usual primary andsecondary windings in the form shown in Fig. 1. The primary winding ofthe coil 0 acts as the actuator for the vibrator and is interposed inthe conductor f. In the modification shown in Fig. 2 two coils c c areemployed, their primary windings being respectively in the conductors dand e and there is a separate actuating coil j for the vibrator binterposed in the conductor s s are the secondary leads which areconnected in the usual way to the contact plates of a distributor.

The operation of the above described device is as follows: i

The arm 1; being actuated by the engine in the usual way makes contactssuccessively with the plates a and a When contact is made with the platea there is a circuit established in which the current flows from thepositive pole of the battery h through the conductor a? to the plate ato the arm 2' then to the ground 9 thence to the ground and thencethrough the actuating coil of the vibrator. Thus causing a current topass through a primary coil to cause the ignition spark in the usualWay.

When the arm 2' makes contact with the plate a the circuit is from thepositive pole of battery group 71. through the conductor f to the ground9 to the arm 2'; plate a and back to the negative pole of the battery itthrough the conductor 6. Thus it will be observed that successivecontacts send the primary current through the make-andbreak device inopposite directions so that the material will not be carried over fromone of the contact points to the other and accumulate.

What I claim is:

1. In an ignition system for internal com- ,bustionengines, thecombination of a source of current, a timer, a make-and-break apparatus,two circuits each including a part of said source of current, timer andmake-andbreak apparatus, said timer being adapted to complete saidcircuits successively, said circuits being arranged so that one shallsend a current in an opposite direction to the other through saidmake-and-break apparatus.

2. In an ignition apparatus for internal combustion engines, thecombination of a timer, a source of current having a positive andnegative terminal, a make-and-break device connected to said source ofcurrent intermediate its terminals, a timer connected to said source ofcurrent through said makeand-break apparatus, said timer being adaptedto complete a circuit through said make-and-break apparatus throughoneterminal and then through the other terminal of said source ofcurrent.

3. In an ignition apparatus for internal combustion engines, thecombination of a timer, a source of current having a positive andnegative terminal, a make-and-break device connected to said source ofcurrent intermediate its terminals, a timer connected 10 to said sourceof current through said makemake-and-break apparatus through oneterminal and then through the other terminal of said. source of current,and a coil in each 1 of said circuits.

In testimony whereof, I sign this specification.

EDWARD S. HUFF.

